Energy Saver Compact Fluorescents - Going green never looked so good Energy savings and reduced operating costs without sacrificing quality of light compared to standard incandescent equivalents;Twist-and-lock connection with two pins for energy-efficient replacement;Saves up to $77 over the life of the lamp when you replace a 100W A19 incandescent lamp with a 23W Energy Saver Twister GU24+;+Based on wattage saved (77W) x replacement lamp's rated average life (10,000 hrs) divided by 1000 x kWh rate (.10) = $77 saved Looking for an energy saver that doesn't look like one? The Philips Energy Saver family provides energy-efficient lighting options that don't just deliver similar light as your standard incandescent light bulb, they also have the same classic shape. Try Philips Energy Savers and see how they truly offer advanced lighting to meet your needs. Self-ballasted;Instant-on;Compact size fits most GU24 fixtures;Meets Californias Energy Efficiency Standards for Residential and Nonresidential Buildings (24 CCR 6);Long life lasts 9 years*;Available in 13, 18,and 23W versions;* Based on an average daily usage of 3-4 hours/day, 7 days/week Ideal for table/floor lamps, wall sconces, surface mounts, reading lamps, recessed fixtures, open hanging fixtures, ceiling fans